# PMAT-502x (Tranche 2): d.items() -> list of (k, v) tuples; composes with
# sorted (tuples are Ord) and len (ctx-aware, v0.1.55).
defsorted_items(d:dict[int, int])->list[tuple[int, int]]:returnsorted(d.items())defnum_items(d:dict[int, int])->int:returnlen(d.items())